I have heard of none Creeker.

The bores can run big--somewhere in the .455-.457" neighborhood I would expect. I have both a Colt New Service and the Smith but they were both shaved for .45ACP and moons. They both shoot well, or at least as well as I do. I loaded some hollow base 265gr. bullets in Auto Rim brass to imitate the Eley round. Great fun!

I recently found an unmolested .455 cylinder for the Colt and hope to put it back to the issued caliber soon.